The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 26, 2021
Filed:
Jul. 27, 2017
Robert Bosch Gmbh, Stuttgart, DE;
Alexander Braeuer, Stuttgart, DE;
Florian Dencker, Tamm, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A method of detecting a blocked pressure line in an internal combustion engine SCR system, which includes a feed pump, a dosing module, a pressure sensor, and an electronic control unit, includes a reference signal of a pressure (p) in the pressure line being measured over a measuring time (t) if a reducing agent solution is not dosed by the dosing module, and a signal energy of the reference signal is then calculated; a pressure signal being measured over the measuring time (t) during the dosing of a dosing mass of the reducing agent solution by the dosing module; and a signal energy of the pressure signal is then calculated; a ratio of the signal energies of the pressure signal to the signal energy of the reference signal being calculated; and finally the blocked pressure line being detected if the ratio falls short of a first pre-definable threshold value.